Browse > Article

A Study on the Forging Prototype Manufacture of Aluminium 7050 Alloys  

Kang, Seong-Ki (한국폴리텍VII대학 컴퓨터응용기계설계과)
Lee, Jea-Kun (건명아크릴(주))
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.4, 2012 , pp. 39-45 More about this Journal
Abstract
In this paper, process conditions are investigated for elimination of the grain coarsening and improved material flow during forging process by both of experiments and FEM analysis. Particular interest has been given to understand role of preform shape on the grain coarsening behavior and magnitude of the hammer forging load. As the results of FEM simulation by using DEFORM-3D, the simulated forging loads were 2,200ton in the case of a machined bar which is machined from 65mm to 60mm diameter, and below 1,900ton in the case of machined preform, respectively. The use of preform has been beneficial for reduction of the forging load and elimination of the grain coarsening. However, in the case of as received bar and the round bar, which was machined to 2.5mm thickness in surface layer, some degree of local grain coarsening behavior has been observed. The optimized preform shape could be properly designed by applying the FEM simulation.
Keywords
Fluctuation; FEM; Strain Rate; Metal Flow Line;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Zienkiewicz, O. C. and Godbole, P. N., "A Penalty Function Approach to Problem of Plastic Flow of Metals with Large Surface Deformation", Journal of Strain Analysis for Engineering Design, Vol. 10, No. 3, pp. 180-183, 1975.
2 Lee, C. K., Kim, W. J., "A Study on the Press Forming by Rectangular Tube of Al6063 Alloys", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 10, No. 6, pp. 56-62, 2011.
3 Weronski, W., Gontarz, A. and Pater, Zb., "The Reasons for Structure Defects Arising in Forgings of Aluminium Alloys Analysed using the Finite Element Method", Journal of Materials Processing Technology, Vol. 92, No. 1, pp. 50-53, 1999.
4 Cho, S. H., Kim, Y. S., Yoo, Y. C., Rhim, S. H. and Oh, S. I., "The Prediction of Deformation Resistance of Al6061 During Hot Deformation", The Korean Institute of Metals and Materials, Vol. 36, No. 4, pp. 502-509, 1998.